Question: Who is the person that was the mother of Giacomo Casanova?
Paraphrase: Who is the individual that was the mother of Giacomo Casanova?
SPARQL (Wikidata):  select distinct ?obj where { wd:Q83321 wdt:P25 ?obj . ?obj wdt:P31 wd:Q5 } 
Answer: Zanetta Farussi